157620213 has 48 divisors (see below), whose sum is σ = 243809280. Its totient is φ = 97977600.

The previous prime is 157620193. The next prime is 157620223. The reversal of 157620213 is 312026751.

It is a happy number.

157620213 is a `hidden beast` number, since 15 + 7 + 620 + 21 + 3 = 666.

It is not a de Polignac number, because 157620213 - 2⁹ = 157619701 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157620223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1446003 + ... + 1446111.

It is an arithmetic number, because the mean of its divisors is an integer number (5079360).

Almost surely, 2^157620213 is an apocalyptic number.

It is an amenable number.

157620213 is a deficient number, since it is larger than the sum of its proper divisors (86189067).

157620213 is a wasteful number, since it uses less digits than its factorization.

157620213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 157620213 is about 12554.6888850341. The cubic root of 157620213 is about 540.1785109409.

Adding to 157620213 its reverse (312026751), we get a palindrome (469646964).

The spelling of 157620213 in words is "one hundred fifty-seven million, six hundred twenty thousand, two hundred thirteen".